water leak at front tubing coupler

I have a water leak at tubing coupler part number
“Tubing Coupler 218518700”.

How is this part replaced? Is it a simple push on fitting, meaning do I just cut off the old coupler and push this one on?

The part is very expensive for a tiny plastic 90 degree elbow. Would it be possible to just get a .25 inch fitting of some sort at Ace hardware?

The part is listed here as Water tube elbow - part [B]AP2114732

Thanks.
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Just found the part I needed at Home Depot locally for $3.47 vs $22+ online - it is the same fitting btw. I have issue resolved and mods may delete this thread. Thanks.